* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
.all-page {
  min-width: 1200px;
}
#lunbo {
  width: 100%;
  height: 430px;
  background-color: #2c2c2c;
}
.cycle {
  left: 0;
  right: 0;
  position: absolute;
  background-color: #2c2c2c;
  width: 90%;
  height: 420px;
  z-index: 90;
  margin: 0 auto;
}
.cycle .imgs {
  width: 95%;
  height: 400px;
  margin: 0 auto;
  height: 430px;
  background-color: #2c2c2c;
  overflow: hidden;
  transition: all 0.5s;
  cursor: pointer;
  text-align: center;
}
.cycle .imgs:hover #goNext {
  right: 35px;
  display: block;
}
.cycle .imgs:hover #goPre {
  left: 35px;
  display: block;
}
.cycle .imgs img {
  transform: translateY(-300px);
  overflow: hidden;
  width: 75%;
  transition: all 1s;
  background-repeat: no-repeat;
  background-size: cover;
  transition: all 0.5s;
}
.cycle .imgs .btn {
  width: 30px;
  height: 60px;
  position: absolute;
  top: 170px;
  z-index: 100;
  background-color: black;
  opacity: 0.3;
  color: white;
  border: none;
  transition: 0.5s;
  cursor: pointer;
}
.cycle .imgs .btn:hover {
  opacity: 0.6;
}
.cycle .imgs #goPre {
  left: -40px;
  display: none;
}
.cycle .imgs #goNext {
  right: -40px;
  display: none;
}
.cycle .imgs .firs {
  position: absolute;
  bottom: 0;
  left: 25%;
}
.cycle .imgs .firs span {
  position: absolute;
  bottom: -1px;
  left: 0;
  color: #f008b6;
  font-size: 4px;
}
.cycle .imgs .secs {
  position: absolute;
  bottom: 0;
  right: 25%;
}
.cycle .imgs .secs span {
  position: absolute;
  bottom: -1px;
  left: 0;
  color: #f008b6;
  font-size: 4px;
}
.hide {
  display: none;
}
#select {
  max-width: 120px;
  max-height: 26px;
  float: left;
  padding: 0 25px;
  outline: none;
  background-color: whitesmoke;
  z-index: 202;
  position: absolute;
  border-left: 1px solid whitesmoke;
  border-right: 1px solid whitesmoke;
  cursor: pointer;
}
#select span {
  font-size: 12px;
}
#select div {
  top: 0;
  left: 80px;
  width: 5px;
  position: absolute;
  color: gray;
}
#select #up {
  opacity: 1;
}
.circle {
  width: 100%;
  margin: 0 auto;
  height: 100px;
  background: linear-gradient(to top, #2c2c2c, rgba(255, 255, 255, 0));
  position: absolute;
  left: 0px;
  bottom: -10px;
}
.circle .circle-box {
  width: 200px;
  height: 20px;
  margin: 70px auto;
  display: flex;
  justify-content: center;
}
.circle .circle-box span {
  margin-right: 10px;
  margin-top: -14px;
  border-radius: 50%;
  width: 15px;
  height: 15px;
  background-color: rgba(248, 248, 248, 0.315);
}
.mid-nav {
  width: 100%;
  height: 150px;
  background-color: #f9f9f9;
}
.mid-nav .mid-nav-box {
  width: 90%;
  height: 100%;
  margin: 0 auto;
  display: flex;
}
.mid-nav .mid-nav-box .classnav {
  margin-right: 30px;
  flex-grow: 1;
  position: relative;
}
.mid-nav .mid-nav-box .classnav h4 {
  margin-right: 10px;
  margin-top: 10px;
  margin-left: 25px;
  color: gray;
}
.mid-nav .mid-nav-box .classnav div {
  display: inline-block;
  height: 100px;
  margin-top: 15px;
  margin-left: 25px;
}
.mid-nav .mid-nav-box .classnav div a:visited {
  color: black;
}
.mid-nav .mid-nav-box .classnav div a {
  height: 30px;
  font-size: 12px;
  line-height: 30px;
  list-style: none;
  display: inline-block;
  margin-right: 20px;
}
.mid-nav .mid-nav-box .classnav div a:hover {
  color: #2093ff;
}
